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                        <h2 id="&#x6570;&#x636E;&#x4F20;&#x9012;">&#x6570;&#x636E;&#x4F20;&#x9012;</h2>
<h4 id="&#x7236;&#x4F20;&#x5B50;&#x548C;&#x5B50;&#x4F20;&#x7236;">&#x7236;&#x4F20;&#x5B50;&#x548C;&#x5B50;&#x4F20;&#x7236;</h4>
<p>&#x7236;&#x4F20;&#x5B50;&#x6307;&#x7684;&#x662F;&#x7236;&#x7EC4;&#x4EF6;&#x5411;&#x5B50;&#x7EC4;&#x4EF6;&#x4F20;&#x9012;&#x6570;&#x636E;&#xFF0C;&#x8FD9;&#x79CD;&#x4F20;&#x9012;&#x65B9;&#x5F0F;&#x53EF;&#x4EE5;&#x4F7F;&#x7528;&#x5B50;&#x7EC4;&#x4EF6;&#x7684;props&#x5C5E;&#x6027;&#xFF0C;&#x5C06;&#x7236;&#x7EA7;&#x7684;&#x503C;&#x4F20;&#x9012;&#x8FDB;&#x53BB;&#x3002;&#x5B50;&#x4F20;&#x7236;&#x6307;&#x7684;&#x662F;&#x5B50;&#x7EC4;&#x4EF6;&#x5411;&#x7236;&#x7EC4;&#x4EF6;&#x4F20;&#x9012;&#x6570;&#x636E;&#xFF0C;&#x8FD9;&#x79CD;&#x4F20;&#x9012;&#x65B9;&#x5F0F;&#x4E5F;&#x662F;&#x4F7F;&#x7528;&#x5B50;&#x7EC4;&#x4EF6;&#x7684;props&#x5C5E;&#x6027;&#xFF0C;&#x5C06;&#x7236;&#x7EA7;&#x7684;&#x4E00;&#x4E2A;&#x65B9;&#x6CD5;&#x7684;&#x5F15;&#x7528;&#x4F20;&#x9012;&#x5230;&#x5B50;&#x7EC4;&#x4EF6;&#x4E2D;&#xFF0C;&#x5B50;&#x7EC4;&#x4EF6;&#x4E2D;&#x8C03;&#x7528;&#x8FD9;&#x4E2A;&#x65B9;&#x6CD5;&#xFF0C;&#x5C06;&#x5B50;&#x7EC4;&#x4EF6;&#x4E2D;&#x7684;&#x6570;&#x636E;&#x4F20;&#x9012;&#x51FA;&#x6765;&#x7ED9;&#x7236;&#x7EA7;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Father</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">Component</span></span>{
    constructor(props){
        <span class="hljs-keyword">super</span>(props);
        <span class="hljs-keyword">this</span>.state = {
            name:<span class="hljs-string">&apos;Rose&apos;</span>,
            iNum:<span class="hljs-number">0</span>

        }
    }
    <span class="hljs-comment">// &#x5B9A;&#x4E49;&#x4F20;&#x7ED9;&#x5B50;&#x7EC4;&#x4EF6;&#x7684;&#x51FD;&#x6570;</span>
    fnGetData=(num)=&gt;{
        <span class="hljs-keyword">this</span>.setState({
            iNum:num
        })
    }
    render(){
        <span class="hljs-keyword">return</span> (
            <span class="xml"><span class="hljs-tag">&lt;<span class="hljs-title">div</span>&gt;</span>
                <span class="hljs-tag">&lt;<span class="hljs-title">h1</span>&gt;</span>&#x7236;&#x7EC4;&#x4EF6;<span class="hljs-tag">&lt;/<span class="hljs-title">h1</span>&gt;</span>
                <span class="hljs-tag">&lt;<span class="hljs-title">p</span>&gt;</span>&#x63A5;&#x6536;&#x5B50;&#x7EC4;&#x4EF6;&#x4F20;&#x8FC7;&#x6765;&#x7684;&#x6570;&#x636E;&#xFF1A;{ this.state.iNum }<span class="hljs-tag">&lt;/<span class="hljs-title">p</span>&gt;</span>
                <span class="hljs-tag">&lt;<span class="hljs-title">Son</span> 
                // &#x4F20;&#x9012;&#x503C;&#x7ED9;&#x5B50;&#x7EC4;&#x4EF6;
                <span class="hljs-attribute">name</span>=<span class="hljs-value">{</span> <span class="hljs-attribute">this.state.name</span> } 
                // &#x4F20;&#x9012;&#x51FD;&#x6570;&#x7ED9;&#x5B50;&#x7EC4;&#x4EF6;
                <span class="hljs-attribute">fnSet</span>=<span class="hljs-value">{</span> <span class="hljs-attribute">this.fnGetData</span> } 
                /&gt;</span>
            <span class="hljs-tag">&lt;/<span class="hljs-title">div</span>&gt;</span>
        )</span>
    }
}
<span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Son</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">Component</span></span>{
    render(){
        <span class="hljs-keyword">return</span> (
            <span class="xml"><span class="hljs-tag">&lt;<span class="hljs-title">div</span>&gt;</span>
                <span class="hljs-tag">&lt;<span class="hljs-title">h2</span>&gt;</span>&#x5B50;&#x7EC4;&#x4EF6;<span class="hljs-tag">&lt;/<span class="hljs-title">h2</span>&gt;</span>
                <span class="hljs-tag">&lt;<span class="hljs-title">p</span>&gt;</span>{ this.props.name }<span class="hljs-tag">&lt;/<span class="hljs-title">p</span>&gt;</span>
                <span class="hljs-tag">&lt;<span class="hljs-title">input</span> <span class="hljs-attribute">type</span>=<span class="hljs-value">&quot;button&quot;</span> <span class="hljs-attribute">value</span>=<span class="hljs-value">&quot;&#x4F20;&#x6570;&#x636E;&#x7ED9;&#x7236;&#x7EC4;&#x4EF6;&quot;</span> <span class="hljs-attribute">onClick</span>=<span class="hljs-value">{()=</span>&gt;</span>{ this.props.fnSet(10) } } /&gt;
            <span class="hljs-tag">&lt;/<span class="hljs-title">div</span>&gt;</span>
        )</span>
    }
}
<span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> Father;
</code></pre>
<h4 id="&#x540C;&#x8F88;&#x7EC4;&#x4EF6;&#x4E4B;&#x95F4;&#x4F20;&#x9012;&#x6570;&#x636E;">&#x540C;&#x8F88;&#x7EC4;&#x4EF6;&#x4E4B;&#x95F4;&#x4F20;&#x9012;&#x6570;&#x636E;</h4>
<p>&#x4F7F;&#x7528;&#x7CFB;&#x7EDF;&#x63D0;&#x4F9B;&#x7684;events&#x6A21;&#x5757;&#xFF0C;&#x5B9E;&#x4F8B;&#x5316;&#x6A21;&#x5757;&#x4E2D;&#x7684;EventEmitter&#x7C7B;&#xFF0C;&#x901A;&#x8FC7;&#x5B9E;&#x4F8B;&#x7684;emit&#x65B9;&#x6CD5;&#x6765;&#x53D1;&#x9001;&#x6570;&#x636E;&#xFF0C;&#x901A;&#x8FC7;&#x5B9E;&#x4F8B;&#x7684;on&#x65B9;&#x6CD5;&#x6765;&#x63A5;&#x6536;&#x6570;&#x636E;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">import</span> { EventEmitter } <span class="hljs-keyword">from</span> <span class="hljs-string">&apos;events&apos;</span>;

<span class="hljs-comment">// &#x5B9E;&#x4F8B;&#x5316;&#x4E00;&#x4E2A;&#x5BF9;&#x8C61;bus&#xFF0C;&#x5144;&#x5F1F;&#x7EC4;&#x4EF6;&#x4E4B;&#x95F4;&#x901A;&#x8FC7;&#x5B83;&#x8FDB;&#x884C;&#x901A;&#x4FE1;</span>
<span class="hljs-keyword">const</span> bus = <span class="hljs-keyword">new</span> EventEmitter();
<span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Father</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">Component</span></span>{
    render(){
        <span class="hljs-keyword">return</span>(
            <span class="xml"><span class="hljs-tag">&lt;<span class="hljs-title">div</span>&gt;</span>
                <span class="hljs-tag">&lt;<span class="hljs-title">h1</span>&gt;</span>&#x8FD9;&#x662F;&#x7236;&#x7EC4;&#x4EF6;<span class="hljs-tag">&lt;/<span class="hljs-title">h1</span>&gt;</span>
                <span class="hljs-tag">&lt;<span class="hljs-title">Son01</span> /&gt;</span>
                <span class="hljs-tag">&lt;<span class="hljs-title">Son02</span> /&gt;</span>
            <span class="hljs-tag">&lt;/<span class="hljs-title">div</span>&gt;</span>
        )</span>
    }
}
<span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Son01</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">Component</span></span>{
    constructor(props){
        <span class="hljs-keyword">super</span>(props);
        <span class="hljs-keyword">this</span>.state = {
            msg:<span class="hljs-string">&apos;&apos;</span>
        }
    }
    <span class="hljs-comment">// &#x7ED1;&#x5B9A;&#x76D1;&#x542C;&#xFF0C;&#x63A5;&#x6536;&#x6570;&#x636E;</span>
    componentDidMount(){
        bus.on(<span class="hljs-string">&apos;go&apos;</span>,dat=&gt;{
            <span class="hljs-keyword">this</span>.setState({
                msg:dat.msg
            })
        })           
    }
    render(){
        <span class="hljs-keyword">return</span>(
            <span class="xml"><span class="hljs-tag">&lt;<span class="hljs-title">div</span>&gt;</span>
                <span class="hljs-tag">&lt;<span class="hljs-title">h2</span>&gt;</span>&#x8FD9;&#x662F;&#x5B50;&#x7EC4;&#x4EF6;&#x4E00;<span class="hljs-tag">&lt;/<span class="hljs-title">h2</span>&gt;</span>
                <span class="hljs-tag">&lt;<span class="hljs-title">p</span>&gt;</span>&#x63A5;&#x6536;&#x5B50;&#x7EC4;&#x4EF6;&#x4F20;&#x9012;&#x8FC7;&#x6765;&#x7684;&#x503C;&#xFF1A;{ this.state.msg }<span class="hljs-tag">&lt;/<span class="hljs-title">p</span>&gt;</span>
            <span class="hljs-tag">&lt;/<span class="hljs-title">div</span>&gt;</span>
        )</span>
    }
}
<span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Son02</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">Component</span></span>{
    <span class="hljs-comment">// &#x5B9A;&#x4E49;&#x4F20;&#x9012;&#x6570;&#x636E;&#x7684;&#x51FD;&#x6570;</span>
    fnSend=()=&gt;{
        bus.emit(<span class="hljs-string">&apos;go&apos;</span>,{
            msg:<span class="hljs-string">&apos;&#x6211;&#x6765;&#x4E5F;&apos;</span>
        })
    }

    render(){
        <span class="hljs-keyword">return</span>(
            <span class="xml"><span class="hljs-tag">&lt;<span class="hljs-title">div</span>&gt;</span>
                <span class="hljs-tag">&lt;<span class="hljs-title">h2</span>&gt;</span>&#x8FD9;&#x662F;&#x5B50;&#x7EC4;&#x4EF6;&#x4E8C;<span class="hljs-tag">&lt;/<span class="hljs-title">h2</span>&gt;</span>
                <span class="hljs-tag">&lt;<span class="hljs-title">input</span> <span class="hljs-attribute">type</span>=<span class="hljs-value">&quot;button&quot;</span> <span class="hljs-attribute">value</span>=<span class="hljs-value">&quot;&#x4F20;&#x503C;&#x7ED9;&#x5B50;&#x7EC4;&#x4EF6;&#x4E00;&quot;</span> <span class="hljs-attribute">onClick</span>=<span class="hljs-value">{</span> <span class="hljs-attribute">this.fnSend</span> } /&gt;</span>
            <span class="hljs-tag">&lt;/<span class="hljs-title">div</span>&gt;</span>
        )</span>
    }
}

<span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> Father;
</code></pre>

                    
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